Stealth
Posts: 3060
Joined: 2/18/2007
Status: offline
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AND you thought your home was safe?
watch and learn ...
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http://www.youtube.com/watch?v=hr23tpWX8lM
"In the 1970s, locksmiths in Denmark shared a technique for knocking on a
lock cylinder while applying slight pressure to the back of the lock plug.
When the pins would jump inside of the cylinder, the plug would be able to
slide out freely and disassemble the lock quickly.
The use of a bump key was not introduced until some time later and was
first recognized as a potential security issue around 2002-2003 by
Klaus Noch who brought it to the attention of the German media.
After further examination of the procedure, a white paper was drafted in 2005 by
Barry Wels & Rop Gonggrijp of The Open Organization Of Lockpickers (TOOOL)
detailing the method and its applicability."
Countermeasures
"Ironically, more precise manufacturing tolerances within the cylinder
make bumping easier as the pins move more freely and smoothly.
Also, more expensive locks made of hardened steel are actually
more vulnerable because they are less prone to damage during
the bumping process which might cause a cheaper lock to jam.
Locks having security pins (spool or mushroom pins, etc.)—even
when combined with a regular tumbler mechanism—generally
make bumping somewhat more difficult, but not impossible.
Electronic locks, magnetic locks, and locks using rotating
disks are not vulnerable to this attack.
Because a bump key must have the same blank profile as the lock it is
made to open, restricted or registered key profiles are much safer from
bumping, as the correct keyblanks cannot legally be obtained without
permission and/or registration with relevant locksmiths' associations.
Locks made by Medeco or Mul-T-Lock (sister companies) are advertised
to be "bump proof. Mececo locks are advertised as unbumpable due to
sidebars that must be alligned to a specific depth to enable pin movement
and pins chiseled at angles to further thwart bumping."
Locks that have trap pins which engage when a pin does not support it will jam
a lock's cylinder. Shallow drilling in which one or more of the pin stacks is drilled
slightly less deeper than the others. If an attempt were made on a lock that has
shallow drilled pin stacks the bump key will be unable to bump the shallow drilled
pins as they are too high for the bump key to engage."
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it took me one search to find a set of BUMP KEYS for $35 - expensive?
it took me two more searches to find other sets for under $15
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Printable Version
The Open Organization Of Lockpickers (TOOOL) - 
